1312563 has 12 divisors (see below), whose sum is σ = 2036040. Its totient is φ = 749952.

The previous prime is 1312561. The next prime is 1312567. The reversal of 1312563 is 3652131.

It is not a de Polignac number, because 1312563 - 2¹ = 1312561 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (1312561) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4318 + ... + 4611.

It is an arithmetic number, because the mean of its divisors is an integer number (169670).

2^1312563 is an apocalyptic number.

1312563 is a deficient number, since it is larger than the sum of its proper divisors (723477).

1312563 is an equidigital number, since it uses as much as digits as its factorization.

1312563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8946 (or 8939 counting only the distinct ones).

The product of its digits is 540, while the sum is 21.

The square root of 1312563 is about 1145.6714188632. The cubic root of 1312563 is about 109.4897302768.

Adding to 1312563 its reverse (3652131), we get a palindrome (4964694).

The spelling of 1312563 in words is "one million, three hundred twelve thousand, five hundred sixty-three".